        .div1 {
            width: 900px;
            height: auto;
            margin: 0 auto;
            margin-top: 100px;
            color: #333;
        }
        
        h2 {
            margin-bottom: 50px;
            font-size: 36px;
        }
        
        #img-box img {
            width: 200px;
            height: 200px;
            vertical-align: top;
        }
        
        #img-box {
            display: none;
            vertical-align: middle;
            color: red;
        }
        
        #btn {
            width: 100px;
            height: 30px;
            text-align: center;
            line-height: 30px;
            background-color: orange;
            border-radius: 4px;
            cursor: pointer;
            color: #FFF;
            /*float: right;*/
            display: inline-block;
            margin-left: 20px;
        }
        
        #Mid {
            height: 25px;
            outline: none;
            border: 1px solid #A8A8A8;
            padding-left: 5px;
        }
        
        #bu {
            width: 400px;
            font-size: 12px;
            position: absolute;
            left: 50%;
            margin-left: -200px;
            margin-top: 200px;
        }
